diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/usb.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 1ec9d248781e..28b053cacc90 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -165,9 +165,20 @@ EXPORT_SYMBOL_GPL(usb_find_common_endpoints); /** * usb_find_common_endpoints_reverse() -- look up common endpoint descriptors + * @alt: alternate setting to search + * @bulk_in: pointer to descriptor pointer, or NULL + * @bulk_out: pointer to descriptor pointer, or NULL + * @int_in: pointer to descriptor pointer, or NULL + * @int_out: pointer to descriptor pointer, or NULL + * + * Search the alternate setting's endpoint descriptors for the last bulk-in, + * bulk-out, interrupt-in and interrupt-out endpoints and return them in the + * provided pointers (unless they are NULL). + * + * If a requested endpoint is not found, the corresponding pointer is set to + * NULL. * - * Same as usb_find_common_endpoints(), but the endpoint descriptors are - * searched in reverse order (see usb_find_common_endpoints() for details). + * Return: Zero if all requested descriptors were found, or -ENXIO otherwise. */ int usb_find_common_endpoints_reverse(struct usb_host_interface *alt, struct usb_endpoint_descriptor **bulk_in, |